Construction of pulley and friction-wheel lagging



I. A. BRIED. cousmucnou 0F PULLEY AND rmcnou WHEEL name. I

APPLICATION FILED JULY 28, I919.

Patented Sept. 20,1921.

IN V EN TOR.

JULIEN A. BRIED, OF

.cous'rnucrron or P LLEY AND rnIoTIouWiiEEL rmeeme.

To all whom it may concern:

Be it known that I, JULIEN A. BRIED,

a citizen of the United States, residing at Oakland, in the county of-Alameda and State of California, have invented a new and usefulImprovement in the Construction of Pulley and Friction Wheel Lagging,,of which the following is a specification and which is illustrated inthe accompanying drawings.

This invention relates to improvements in the method of covering orlagging of motor pulleys, friction wheels, and the like, with leather,canvas, or rubber, etc., and has for its principal object an easilyproduced lagged pulley or wheel, the lagging of which will not becomeloosened in operation of the wheel, but will constantly tend to tightenup due to the frictional drag of belts or the frictional pull androlling action of other wheels operating against it.

3 In the drawings accompanying this applicationFigure 1 shows in crosssection, a wheel'covered or lagged by my improved,

self-tightening wrapp ng, using a covering material of round crosssection. a Fig. 2- shows in cross section, a conical friction wheelcovered by thesame method, but with a square form, covering material.Fig. 3 is a perspective view of a similar wheel to that shown in Fig. 2,but with a differentarrangement ofthe final end of the wrappingmaterial. v

Fig. 4 showsin end section, aportion of rim with an automatic clamp toof the wrapping. I .-Fig. 5 is a perspective view of a wheel havingmultiple, parallel grooves, each provided with a free to creep wrappingin accordance with my invention.

Fig. 6 is a cross section of a wheel with a single spiral groove acrossits face containing one of my improved wrappings and shown rolling incontact with a grooved mating wheel.

Fig. 7 is a erspective view of a similar wheel, but with multiple rightand left grooves, each containing an individual wrapping in accordancewith my invention, and the wheel is shown in contact wlth a I matingwheel grooved to correspond.

In further detail, and in which all reference letters in the variousviews denote features of my invention having like functions,

' Specification of Letters Batent.

.as actualuse has demonstrated. f wrapping, may be of doubleor triplelead if desired, or right and left hand coils with the free'ends wedgedbetween the coils in the Patented se t. 20,1921.

. Application filed J'u1y 28, 1919. Serial No. 3 13,860.

plied to a pulley or spur-friction wheel Fig. 1 is a sectional viewoflaggingaplow flanges or retaining edges K are formed on the wheel toholdthe lagging from shifting; A round section leather lagging strip B'is used in this example, the starting end G being screwed tightly intoa threaded hole L, and the finalend of the coil F being simplypulledthrough'an easy fitting hole G. The flanges K are shown of lesser heightthanthe lagging but may be of the same height or higher if desired.

Fig. 2 is a sectional view of a bevel friction wheel of similarconstruction to the wheel shown in Fig. 1, but in this case a leatherstripB of square section is used for the wrapping, the starting orfastened end C being rounded and screwed tightly in the threaded hole Lin the wheel A.

Fig. 3 shows a helically wound bevel frict on wheel or pinion of thesame cross section as the wheel shown in Fig. 2, except that the freeend F of the la ging B is not secured at all except by motion, beingtapered off as shown and wedged in tightly between the last lap of thelagging and the retaining edge K. It will notjbe displaced in operationof the wheel even at high rotative speeds, and is free to creep andconstantly wedge itself more tightl in place, he helical center. I I

Fig. 4 shows a simpleautomatic clamp for holding the loose end of thelagging when my lagging is applied to a pulley with a rim or wheel largeenough to accommodate it, and consists of a fiat spring plate R held inplace against the inside of the pulley A,

b the bolt S. The free end of the spring l t is sharpened at T toimpinge upon the loose end F of the lagging B after the same has beenpassed through the loosehole G. The

,creep of the lagging coils willthus automatically be taken up by theaction of the spring clamp which permits the lagging to be pushed pastit but prevents it from pulling or working back. If desired this or asimilar device may be used on both ends of the lagging, thus permittingthe pulley or.

wheel to be revolved in either direction and the slackto be taken upautomatically at either end. I V

Fig. 5 shows a still further modification, around leather belt laggingin a multiple grooved Wheel A, thesegrooves N, N, etc., however, notbeing helical but placed side by side, each having a separate piece ofround. lagging B, B B etc., fastened to thewheel'only attheir startingends C, C

C, etc., in the holes L, L L etc., and the final ends of each piece,'F,F F etc. being inserted infthe easily fitting holes G, G etc.,. topermit the lagging to creep into said holes when elongating inoperation. This wheel is adapted to mate either with a plain facedwheelunder' frictional contact, or in contact witha wheel grooved to.correspond,

this latter giving "a higher power transmitting ca acity with equalpressure. The wheel A i used as the driver must be rotated in adirection to cause constant tightening of the lagging strips by forcingthe slack in a direction away from the secured ends.

Fig. dis a sectional view showin a still further modification of theinvention Wherein ala'gging B of round section is secured to the wheelA, at one end C; as previously desired,"a's it is essentially nodifferent than the wheel shown'in Fig. 1, except that the helical,groove inth'e wheel insures an even spacing to thehelical lagging strip.

F ig. 7 shows a pair of multiple helical grooved wheels of thesameconstruction described in the preceding paragraph, but

formed with right and left hand helices of much greater angle, bestconstructed out of rightand left halves joined at Q. The lagging B, ofeach groove of the wheel A is separately fastened to the wheel tightlyat one end and pushedinto a hole at the other end, as previouslydescribed, and, while it may be operated against a plain faced matingwheel, it is particularly adapted to roll in'c'ontact with a right andleft multiple grooved mat-ing, wheel P, in which the mating grooves arelettered 0. Any groove and its laggmgiwould have the same cross sectionas a groove and lagging shownin Flg.

6. 'As the drawing Fig. 7 clearly shows 7 many separate grooves on thewheel A, consecutive lettering of them has not been attempted. y

This adaptation of my invention, while essentially no different from twoof the I left hand and operating together on a comwheels shown in Fig.1, wound right and men shaft, forms when runningv with the multiplegrooved wheel P, apositive cushioned drive geargset operating under verylowbearingpressure as compared to common friction gears.

In using the word helical 'in the specification and claims it isintended to mean coils that are not wrapped upon eachroth'er oroverlappingas are true spiral coils, though in the case of bevelfriction wheels as shown in Figs. 2 and3, or with wheels of even greaterangularity fhelical wrapplngs gradually become volute or spiral in form,but these are intended tobe embraced in my use of the word .helicalherein.

1. On a friction wheel, a striplagging' of friction material adapted'toautomaticallly tighten itself upon the wheel through rol ing pressure ofuse.

2. A pulley or wheel lagged on its rim surface with a strip, of laggingmaterial, with an end of said strip secured to. the

pulley'and the remainder free to creep and pulley through tighten itselfagainst the the rolling pressure of use. 5 r I 3. A pulley or wheellagged on its rim surfaceiwith a stripoflagging material, with one endof said strip secured to the pulley and the other end free to creep indirection of lengthening the strip. y

4. A pulley or wheel wrapped about its rim surface in a helical mannerwith a strip of lagging material, one end of said strip secured to thepulley and the other end free to creep in direction of lengthening thestrip. v p x 5. A friction wheel or pulley with a strip of frictionmaterial wrapped around the upon the operation of said pulley,

6. A friction wheel or pulley with a strip of friction material, wrappedin a helical manner around the face of its rim and means operativeagainst an end of said strip for automatically taking up any slack.developed in the wrapping upon the operation of said pulley.

7. A friction wheel construction compris- I ing a flanged wheel, a stripof friction material. wrapped around said wheel in a helical manner, oneend of said strip. secured to the wheel and the, other end held in placefriction, with freedom to creep. in direction of lengthening-the strip.7

8. A friction wheel construction comprising a flanged wheel, a strip offriction Ina-- terial rapped around said wheel ina helical manner, oneend of said'strip secured to the wheel and the other end held in placeby friction between the flange of the wheel and the last lap ofth'ewrapping.

[face of its rim, and means operative against .an end of said stripfora'utomaticallytaking up any slack developedin the wrapping 9. Awheel, a groove around said wheel, 7

a strip of resilient material in said groove and projecting therefrom,one end of said strip fastened to the wheel and the other end free tocreep in direction of lengthening the strip.

10. A Wheel, a threaded hole in said wheel, a strip of friction materialscrewed at one end into said hole and wrapped about the face of thewheel with its final end held to the wheel by friction.

11. A wheel,' a threaded hole in said final end wedged between the lastcoil of the wrapping and a portion of said Wheel.

JULIEN A. BRIED.

- Witnesses:

MARGARET E. CLBRIED, M. D. NIoHoLs.

